Cov tshuab hais lus rau pej xeem (PA)siv dav hauv cov chaw tsim khoom, tsev kawm ntawv, chaw thauj mus los, thiab cov tsev lag luam rau kev tshaj tawm, suab paj nruag tom qab, thiab kev sib txuas lus thaum muaj xwm txheej ceev.

Thaum tsim lub PA system, ib qho ntawm cov lus nug feem ntau yog:

Qhov txawv ntawm cov neeg hais lus tsis tu ncua voltage thiab cov neeg hais lus impedance qis yog dab tsi?

Ob hom no siv dav hauv cov tshuab suab, tab sis lawv ua haujlwm sib txawv nyob ntawm qhov loj me thiab qhov yuav tsum tau ua ntawm kev teeb tsa.

Cov Neeg Hais Lus Uas Muaj Qhov Hluav Taws Xob Tsis Tu Ncua Yog Dab Tsi?

Cov neeg hais lus tsis tu ncua feem ntau siv rau hauvcov kev hais lus rau pej xeem lojCov kab ke no feem ntau ua haujlwm ntawm70V los yog 100V, yog vim li cas lawv thiaj li feem ntau hu uaCov tshuab hais lus 70V/100V.

Hauv lub kaw lus hluav taws xob tas li, lub amplifier tso tawm lub teeb liab high-voltage, thiab txhua tus neeg hais lus muaj xws li alub transformer uas ua rau hauvLub transformer no tso cai rau cov neeg teeb tsa xaiv cov qib fais fab sib txawv xws li:

3W

6W

10W

20W

Vim yog qhov kev tsim no, ntau lub tso suab tuaj yeem txuas nrognyob rau hauv parallel raws tib txoj kab cable.

Cov txiaj ntsig ntawm Cov Tshuab Hluav Taws Xob Tsis Tu Ncua

Yooj yim txuas ntau lub tso suab

Haum rau kev xa suab ntev ntev

Kev faib hluav taws xob yooj ywm

Tsim thiab teeb tsa lub kaw lus yooj yim

Cov Ntawv Thov Ib Txwm Muaj

Cov neeg hais lus tsis tu ncua feem ntau siv rau hauv:

cov chaw ua haujlwm thiab cov chaw lag luam

tshav dav hlau thiab chaw nres tsheb ciav hlau

cov tsev kawm ntawv thiab cov tsev kawm ntawv qib siab

cov khw loj

chaw nres tsheb thiab chaw sab nraum zoov

Cov chaw no feem ntau xav taucov neeg hais lus coob thiab thaj chaw dav dav.

Cov Neeg Hais Lus Uas Tsis Muaj Peev Xwm Tsawg Yog Dab Tsi?

Cov neeg hais lus impedance qis ua haujlwm ntawm4 ohms los yog 8 ohmsthiab txuas ncaj qha rau lub amplifier yam tsis muaj transformer.

Cov txheej txheem no feem ntau yog siv rau hauv cov chaw uaslub suab zoo yog qhov tseem ceeb tshaj plaws.

Cov txiaj ntsig ntawm Cov Txheej Txheem Low Impedance

Zoo dua lub suab zoo dua

Kev sib txuas ncaj qha rau lub amplifier

Kev hloov pauv fais fab zoo

Cov Ntawv Thov Ib Txwm Muaj

Cov neeg hais lus qis impedance feem ntau siv rau hauv:

cov tshuab suab hauv tsev

chav sib tham

cov khw noj mov thiab cov khw haus dej cawv

cov chaw ua suab paj nruag nyob

cov tshuab suab hauv tsev ua yeeb yam thiab theem

Txawm li cas los xij, cov kab ke no feem ntau yog tsim los raucov chaw teeb tsa me me nrog cov neeg hais lus tsawg dua.

Qhov Hluav Taws Xob Tsis Tu Ncua vs Qhov Tsis Muaj Peev Xwm Tsawg: Qhov Txawv Tseem Ceeb

Koj Yuav Tsum Xaiv Lub Tshuab Hais Lus Twg?

Qhov kev xaiv ntawm qhov hluav taws xob tas li thiab cov neeg hais lus impedance qis nyob ntawm daim ntawv thov.

Cov tshuab hluav taws xob tas li yog qhov zoo tagnrho thaum:

thaj chaw teeb tsa loj heev

xav tau ntau tus neeg hais lus

cov kab ntev ntev

lub kaw lus no siv rau kev tshaj tawm lossis suab paj nruag tom qab

Cov txheej txheem impedance qis dua zoo dua thaum:

lub suab zoo yog qhov tseem ceeb tshaj plaws

tsuas yog xav tau ob peb tus neeg hais lus xwb

thaj chaw teeb tsa me me

Xaus lus

Qhov hluav taws xob tas li thiab cov neeg hais lus impedance qis yog ob qho tseem ceeb hauv kev tsim lub suab.

Cov tshuab hluav taws xob tas liyog cov kev xaiv txheem rau kev teeb tsa chaw hais lus rau pej xeem loj vim tias lawv txhawb nqa ntau lub tso suab thiab cov xov hlau ntev.

Cov txheej txheem impedance qis, ntawm qhov tod tes, zoo dua rau cov tshuab suab me me uas xav tau lub suab zoo.

Kev nkag siab txog cov qhov sib txawv no pab cov engineers thiab cov neeg teeb tsa xaiv qhov kev daws teeb meem zoo tshaj plaws rau lawv cov haujlwm PA system.